SMS notifies OAM when a new SCDS has been activated. OAM takes action depending on the RESTART parameter that is specified on the OAM address space. If RESTART=YES is specified, or defaulted, the OAM address space automatically restarts, rebuilding its configuration to match the newly activated SCDS. If RESTART=NO is specified, OAM does not automatically restart, but issues a message acknowledging that an activation has taken place. In this case, you must determine if an OAM restart is necessary. If a restart is necessary, use the MODIFY OAM,RESTART command.

When RESTART=YES is specified, the length of the delay between the SCDS activation and the OAM restart depends on the value specified in the INTERVAL keyword in the active IGDSMSxx PARMLIB member. During this reinitialization, all optical libraries and drives defined to the new SCDS are reset to the initial status values specified in the SCDS. After the OAM restart completes, display all optical libraries and drives, and tape libraries, and then set them to the desired online or offline status before the reinitialization occurred.

For more information, see z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Object Support.